Belloite Mineral Data

Belloite Mineral Data

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General Belloite Information

Chemical Formula:

Cu(OH)Cl

Composition:

Molecular Weight = 116.01 gm

Copper 54.78 % Cu 68.57 % CuO

Hydrogen 0.87 % H 7.76 % H₂O

Chlorine 30.56 % Cl 30.56 % Cl

- % Cl -6.90 % -O=Cl₂

Oxygen 13.79 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu(OH)Cl

Environment:

Secondary mineral in an abandoned mine associated with nitratine, paracamite. Unstable in humid environments. Converts in water to botallackite and atacamite.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

Sierra Gorda, Antofagasta, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for Andres Bello (1780-1865), founder and first rector of the Universidad de Chile.

Synonym:

IMA1998-054

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Belloite Crystallography

Axial Ratios:

a:b:c =0.8326:1:0.9184

Cell Dimensions:

a = 5.552, b = 6.668, c = 6.124, Z = 4; beta = 115° V = 205.47 Den(Calc)= 3.75

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.553(1)(001), 2.758(0.52)(112,121), 2.785(0.52)(120,002,201), 2.241(0.27)(122), 1.851(0.21)(213,003), 2.516(0.18)(200), 1.769(0.16)(311,122

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wyckoff R W G , Crystal Structures , 1 (1963) p.282-287, Second edition. Interscience Publishers, New York, New York

Physical Properties of Belloite

Color:

Yellowish green, Olive green.

Diaphaniety:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

1-2 - Between Talc and Gypsum

Luster:

Vitreous (Glassy)

Streak:

yellowish green

Optical Properties of Belloite

Gladstone-Dale:

CI calc= 0.109 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2133,KC= 0.2395

Optical Data:

Biaxial (?), b=1.8

Calculated Properties of Belloite

Electron Density:

r_electron=3.56 gm/cc
note: r_Belloite=3.75 gm/cc.

Fermion Index

Fermion Index = 0.00006
Boson Index = 0.99994

Photoelectric:

PE_Belloite= 26.39 barns/electron
U=PE_Belloite x r_electron= 93.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Belloite is Not Radioactive

Belloite Classification

Dana Class:

10.2.3.2 (10)Oxyhalides and Hydroxyhalides

(10.2)where A (O,OH) Xq

(10.2.3)Dana Group

10.2.3.1 Paralaurionite PbCl(OH) C 2/m 2/m

10.2.3.2 Belloite ! Cu(OH)Cl P 2₁/a 2/m

Strunz Class:

III/D.01-25 III - Halogenides

III/D - Oxi-halogenides with Mg - Mn - Cu - Zn - Sn

III/D.01 - Atacamite series, Korshunovskite - Anthonyite

III/D.01-10 Korshunovskite Mg2Cl(OH)3·3.5-4(H2O) P1 or P1 Tri

III/D.01-12 Nepskoeite! Mg4Cl(OH)7·6(H2O) Pcmm,Pcm2,Pc2m Ortho

III/D.01-15 Hibbingite (Fe,Mg)2(OH)3Cl Pnam 2/m 2/m 2/m

III/D.01-20 Kempite Mn2Cl(OH)3 Pnam 2/m 2/m 2/m

III/D.01-25 Belloite Cu(OH)Cl P 2₁/a 2/m

III/D.01-30 Atacamite Cu2Cl(OH)3 Pmcn 2/m 2/m 2/m

III/D.01-40 Clinoatacamite! Cu2(OH)3Cl P 2₁/n 2/m

III/D.01-50 Botallackite Cu2Cl(OH)3 P 2₁/m 2/m

III/D.01-55 Paratacamite (Cu,Zn)2(OH)3Cl R 3 3

III/D.01-57 Herbertsmithite! Cu3Zn(OH)6Cl2 R 3m 3 2/m

III/D.01-60 Melanothallite Cu2OCl2 F ddd 2/m 2/m 2/m

III/D.01-65 Bobkingite! Cu5Cl2(OH)8(H2O)2 C 2/m 2/m

III/D.01-70 Calumetite Cu(OH,Cl)2·2(H2O) Unk Ortho

III/D.01-80 Anthonyite Cu(OH,Cl)2·3(H2O) Unk. Mono

Other Belloite Information

References:

NAME( AmMin, Vol 85) PHYS. PROP.(AmMin, Vol 85) OPTIC PROP.(AmMin, Vol 85)

See Also:

Links to other databases for Belloite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Print or Cut-and-Paste your Belloite Specimen Label here :

Belloite

Cu(OH)Cl
Dana No: 10.2.3.2 Strunz No: III/D.01-25
Locality:

Notes: